This is the page where I will put all my tips and tricks for Jekyll and Github Pages.

If, like me, you are tired of making command line programs in Java and having to run them with this kind of things:

$ java -jar demo-app-v1.0.0-SNAPSHOT.jar arg1 arg2 arg3`

This little article should please you. You will then be able to do this directly:

$ ./demo-app arg1 arg2 arg3

Appetizing!

In this little tutorial, I will generate an executable file :

• for Linux and MacOSX,
• for Windows, an .EXE,
• as a classic Runnable JAR.

However, this requires the presence of a JAVA Runtime (JRE and/or JDK) on the machine that will run it, although there are also solutions to embed a JRE.

The solutions I will describe do not use GRAALVM and its native compilation.

Java 12 was released on 20/03/19, bringing a new way to write switch/case control structures. This gave me an idea, admittedly a bit strange, to revisit the traditional switch/case from a functional programming point of view by using lambdas and a small Switch class, all in JAVA 8!

Be careful though, it is certain that this approach is much less efficient than a classic switch/case, but I don’t give up the beauty of the gesture.

Versions of this article:

• 04/10/2019: first publication.
• 26/02/2020 : following a judicious idea posted on “developpez.com” forums, see the “Let’s go further …” part.

I will present in this post the Lombok library which I’m currently using for quite every development in Java. After 4 years dealing with it, I wish I could share some experience and give some advice.

As an excerpt, here is my best : don’t use @Data but you’ll need to be patient and to read the conclusion to know why.